public class ArrayCopy {
    public static void main(String[] args) {
        int arr1[] = {10,20,30};
        int arr2[] = new int[arr1.length];
        //arr2[] = arr1[];错误
        for (int i = 0;i < arr1.length;i++) {
            arr2[i] = arr1[i];
            System.out.println(arr1[i]);
            System.out.println(arr2[i]);
        }
        System.out.println("====两种打印出的结果对比====");
        for (int i = 0;i < arr1.length;i++) {
            System.out.println(arr1[i]);
        }
        for (int i = 0;i < arr1.length;i++) {
            System.out.println(arr2[i]);
        }
    }
}
